Danfoss VLT FC 103 Programming Manual page 63

Parameter Description
3 3
[54] Auto start
[55] DigiPot
Increase
[56] DigiPot
Decrease
[57] DigiPot Clear
[62] Reset Counter
A
[65] Reset Counter
B
[66] Sleep Mode
[78] Reset
Preventive
Maintenance
Word
The below setting options are all related to the Cascade
Controller. Wiring diagrams and settings for parameter, see
parameter group 25-** for more details.
[120] Lead
Compressor
Start
[121] Lead
Compressor
Alternation
[130 Compressor 1
- Interlock -
132] Compressor 3
Interlock
62
®
VLT Refrigeration Drive Programming Guide
another digital input must be assign to
Auto Start and a signal applied to this.
[Hand On] and [Auto On] have no impact.
[Off] will override Hand Start and Auto Start.
Press either [Hand On] or [Auto On] to make
Hand Start and Auto Start active again. If no
signal on neither Hand Start nor Auto Start,
the motor will stop regardless of any
normal Start command applied. If signal
applied to both Hand Start and Auto Start,
the function will be Auto Start. If pressing
[Off] the motor will stop regardless of
signals on Hand Start and Auto Start.
A signal applied will put the frequency
converter into Auto mode as if [Auto On]
has been pressed. See also [53] Hand Start.
Uses the input as an INCREASE signal to the
Digital Potentiometer function described in
parameter group 3-9*
Uses the input as a DECREASE signal to the
Digital Potentiometer function described in
parameter group 3-9*
Uses the input to CLEAR the Digital Potenti-
ometer reference described in parameter
group 3-9*
Input for reset of counter A.
Input for reset of counter B.
Forces frequency converter into Sleep Mode
(see parameter group 22-4*, Sleep Mode).
Reacts on the rising edge of signal applied!
Resets all data in 16-96 Maintenance Word,
to 0.
Starts/Stops the Lead Compressor
(controlled by the frequency converter). A
start requires that also a System Start
signal has been applied e.g. to one of the
digital inputs set for [8] Start!
Forces alternation of the lead Compressor
in a Cascade Controller. Lead Compressor
Alternation, 25-50, must be set to either
[2] At Command or [3] At Staging or At
Command. 25-51 Alternation Event can be
set to any of the four options.
For all 3 setting options below,
25-90 Compressor Interlock, must be set to
[1] On. The function will also depend on
the setting in 25-06, Fixed Lead
Compressor. If set to [0] No, then
MG16H102 - VLT
[139] Compressor 1
Inverse
Interlock
[140] Compressor 2
Inverse
Interlock
[141] Compressor 3
Inverse
Interlock
5-10 Terminal 18 Digital Input
Option: Function:
[8] Start Functions are described under parameter group 5-1*
*
5-11 Terminal 19 Digital Input
Option: Function:
[10] Reversing Functions are described under parameter group
*
5-1*
5-12 Terminal 27 Digital Input
Option:
[2] Coast inverse Functions are described under parameter
*
®
is a registered Danfoss trademark
Compressor 1 refers to the Compressor
controlled by relay RELAY1 etc. If set to [1]
Yes, Compressor 1 refers to the
Compressor controlled by the frequency
converter only (without any of the build
in relays involved) and Compresso r2 to
the Compressor controlled by the relay
RELAY1. Variable speed Compressor (lead)
cannot be interlocked.
See below table:
Setting in Setting in par. 25-06
parameter
[0] No
group 5-1*
[130] Controlled
Compressor by RELAY1
1 Interlock (only if not
lead
Compressor) interlocked)
[131] Controlled
Compressor2 by RELAY2
Interlock
[132] Controlled
Compressor3 by RELAY3
Interlock
Table 3.11
Interlocks compressor 1 of the Pack
Controller when digitally low and issues
Warning [W219]. When inversely
interlocked, compressor 1 (the lead
compressor) is staging according to the
Fixed Speed Neutral Zone ( 25-23).
Interlocks compressor 2 of the Pack
Controller when digitally low and issues
Warning [W219].
Interlocks compressor 3 of the Pack
Controller when digitally low and issues
Warning [W219]..
Function:
group 5-1*
[1] Yes
Frequency
Converter
controlled
(cannot be
Controlled
by RELAY1
Controlled
by RELAY2